German contemporary artist Katharina Fritsch's sculpture 'Hahn/Cock'. A blue cockerel, on The Fourth Plinth in Trafalgar Square, London. The Fourth Plinth was originally intended to hold a statue of William IV, but remained bare due to insufficient funds. For over 150 years the fate of the plinth was debated; in 1999, a sequence of three contemporary artworks to be displayed on the plinth were announced. The success of this initiative led to a commission being formed to decide on a use for the plinth.